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[SOLVED] Cannot connect via XDMCP

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    #1

    [SOLVED] Cannot connect via XDMCP

    Hello,

    I used ubuntu since hoary, and recently replaced my kubuntu 6.10 (edgy I think) with intrepid. It work quite well, except for one problem. I need to enable XDMCP access because I have 2 computers at home: this one with kubuntu and another one (an old Pentium II with a simple debian install). I had previously activated the connection by XDMCP in the kubuntu PC, and connected from the debian kdm login, via remote loggin, to connect to it.

    The problem is that since I installed intrepid I cannot connect. I get a chooser showing the kubuntu computer, but when I connect to it I just have a black screen with a cross-like mouse pointer.

    I have changed the corresponding lines in /etc/kde4/kdm/kdmrc and in /etc/kde4/kdm/Xaccess. I thought I could be a firewall restriction but it seems that configuring ufw makes no change.


    Could someone help me, please? probably is quite easy to solve, but could not find any solution.
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    #2
    Re: Cannot connect via XDMCP

    As you have prior experience with this, when you edited /etc/kde4/kdm/Xaccess did you uncomment:
    #* #any host can get a login window
    and does /etc/kde4/kdm/kdmrc read:
    [Xdmcp]
    Enable=true
    Windows no longer obstructs my view.
    Using Kubuntu Linux since March 23, 2007.
    "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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      #3
      Re: Cannot connect via XDMCP

      Thanks for your help. Sure, that is what I did.

      Also, if I try:
      Code:
      X -query 192.168.2.1
      does not work.

      Regards,



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        #4
        Re: Cannot connect via XDMCP

        This is quite old, but it may help you towards figuring out what to do:
        Linux XDMCP HOWTO
        Windows no longer obstructs my view.
        Using Kubuntu Linux since March 23, 2007.
        "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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          #5
          Re: Cannot connect via XDMCP

          Thanks a lot, I already knew that link. Is one of the places I studied some years ago when I first started with XDMCP. I'll give it a look.

          I really need to solve this, because my wife (who connects by XDMCP) want to go back to kubuntu 6.10....

          I hope someone could know more information about this.

          Thanks again.
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            #6
            [SOLVED] Re: Cannot connect via XDMCP

            Finally !!!

            It was easy, quite easy... I write here the way I followed to discover the problem:

            in /var/log/syslog I've just seen these lines: (note that 192.168.2.1 is kubuntu XDMCP server and 192.168.2.2 is debian XDMCP client)

            kdm[7568]: Cannot convert Internet address 192.168.2.2 to host name
            kdm[7568]: Display 192.168.2.2:0 cannot be opened

            so I edited /etc/hosts and added:
            #bucanera is the host name of the client
            bucanera 192.168.2.2


            and without a real knowledge of the next step I also edited /etc/hosts.allow and added:
            ALL:bucanera

            and then restart.... and it worked. I post here the solution for someone else.

            Thanks again.
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              #7
              Re: [SOLVED] Cannot connect via XDMCP

              Great! As to the entry you added to the /etc/hosts file. I'm pretty sure the syntax is:

              IP hostname
              You should have noticed that you had at least two other entries already in this file. As to making the change to the /etc/hosts.allow file. I'm not !00% sure you needed to do that. I'd comment it out, restart and see if things still work as expected.
              Windows no longer obstructs my view.
              Using Kubuntu Linux since March 23, 2007.
              "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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                #8
                Re: [SOLVED] Cannot connect via XDMCP

                Originally posted by Snowhog
                ...
                As to the entry you added to the /etc/hosts file. I'm pretty sure the syntax is:

                IP hostname
                You are right, I have a mistake in the previous post.
                Regarding the line in /etc/hosts.allow. I will try later.

                Thanks again.
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